Direct electron-impact mechanism of excitation of mercury monobromide in a double-pulse dielectric-barrier-discharge HgBr lamp

Abstract

In a nonequlibrium plasma of a gas-discharge HgBr lamp, the terminal electronic state of the HgBr(B-X) radiative transition with a peak wavelength of 502 nm remains populated for a relatively long time and is repeatedly excited to the B state in collisions with plasma electrons. This transfer of the HgBr molecules from the ground state X to the excited state B is the main mechanism of formation of the light-emitting molecules especially when the lamp is excited by double current pulses. According to our simulations, due to the electron-induced transitions between HgBr(X) and HgBr(B), the output characteristics of the DBD lamp operating in a double-pulse regime are better than those of the lamp operating in a single-pulse regime. In the considered case, the peak power is calculated to increase by a factor of about 2 and the lamp efficiency increases by about 50%.

Spectral Characteristics of the Barrier Discharge on Mercury Diiodide Vapor with Neon Mixture

“…-state (reaction 6) is excited, the rate constant of which is 2.7•10 -13 m 3 /s [26]. Electronvibrational transitions…”

Mechanism Enhancing the Emission Power of Gas-Discharge Lamps Based on Mixtures of Neon, Nitrogen, and Mercury Dichloride Vapor in the Blue-Green Spectral Interval

“…where HgCl( 2 Σ + 1/2 ) is a mercury monochloride molecule in the ground state, which had no time to recover into a triatomic molecule (mercury dichloride) in the reaction [38,39] HgCl…”

Emission characteristics of Xe–RbBr plasma

“…Moreover, many different UV radiation sources, emitting on transitions of exciplex molecules of inert gas halides, have been created. It should be noted that toxic mixtures, such as mixtures with mercury or cadmium vapor [7][8][9], are part of the working mixtures that have proved to be the best in practice. Therefore, despite a lot of existing gas mixtures being used to produce radiation of exciplex molecules, studies of working media on new non-traditional mixtures, in particular, on the xenon-rubidium bromide mixture, which have similar emission properties but contain only non-toxic and environmentally friendly species, are of interest.…”